Rolling-mill for rolling tubes.



M. KOCH.

ROLLING MILL FOR ROLLING TUBES.

APPLICATION FILED JUNE 22,1911. 1,067,990. Patented July 22, 1913.

2 SHEETS-SHEET 1.

M. KOCH.

ROLLING MILL FOR ROLLING TUBES.

APPLICATION FILED JUNE 22, 1911.

1,067,990, Patented July 22, 1913.

2 SHEETS-SHEET 2.

UNITED STAJEES MAX KOCH. OF R ATINGIIN, GELMANY.

ROLLING-D'IILL FOR ROLLING TUBES Specification oi Letters Patent.

Patented July 22, i 913.

Application filed June 22. 1911. Serial No. 634.728.

b all whom, it may concern. I

Be it known that l, MAX Keen, a citizen of the Empire of Geri'nany, residing at Ratingen, in the lhnpire of Germany, have invented certain new and useful Improvements in Rolling'Mills of which the following is a specification.

The present invention relates to a rolling 3 whence it is lifted to the incline 17, from mill for rolling tubes. 4

The rolling mill Works with two pairsv of rolls arranged side by side, the rolls continuouslv revolving m such a manner that the pair of rolls on the left will roll the piece to the left and the pair of rolls on the right will roll the piece to the right. The rolls of both pairs may he arranged in such a manner that they can be adjusted toward or away from each other in known manner and alternately so that either one or other pair of rolls Will be in opei ative post tion.

The rolls are provided with several grooves and eorresptunlinfly several mandrels arc alternately arranged on both sides of the rolling mill, so that a mandrel on the right corresponds to a free groove on the left and vice versa The rods of, the iiindrels are adjustable in such a manner that they cawbewithdrawn from the work piece The rolling mill comprises means for moving the Work from one groove to the other and embodies a, novel arrangement of the grooves in the rolls.

in the accornj'ianying drawings: Figure 1 is a side elevation otmy impr ved rolling mill; Fig. 9, arflan' thereof; Fig. 23 a cross section tlirough table 9 and adjoining parts online 3, 3 Fig. Fig. 4 a siiniiar section through table 8 and adjoining; parts on line 4. -l Fig. 2, and Fig. 3 a cross sect on through a preferred form of the table.

In the constructional form exemplified in the accompanying drawing the one pair of rolls 1, 2 is provided with two grooves 5 7 and the other pair of rolls t \vith one groove 6. The \ertically adjustable tables b and 9 are provided in the eonetructxional form according to Figs. Ll on both sides of the rolling mill with grooies l0, i3, 14 and 11, 9, l5 respectively "orrespondinpf with the grooves in the ro ls. The Work piece rearhes the groove 1t) from the in I clined way 16. It is then passed in this groove to the first groove 5 of rollsv ll t then passes on the other side into the groove tor Boiling Tubes,

l1. Alter the mandrel has been withdrawn by mechanical means the work piece is moved into the neighboring groove 12. in which it is advanced so that it enters v the second groove 6 in the second pair of rolls 3, 4. it then emerges into groove l3, is thence conveyed into groove 1- and groove 7. whereupon it passes into groove 15 which it Will roll down. Al )ovethe grooves into which the piece will emerge on leaving the rolls, are provided vertically adjustable guidesfifZS and 26 which will prevent the piece from Warping or j umping the "groove. Beneath the grooves, levers or transporters 21, 22 and 23 coupled to shafts 18, it) and 20 are arranged. For permitting these lovers to rise above the bottom of the grooves, transverse slots 4;2 are provided in the. latter through which the levers can pass. The guides and levers are operated by the same driving gear. When the work piece has left a roll and has entered one of the grooves beneath the lowered guide, the mandrel rod is first withdrawn and the guide is raised, after which the levers which enter into this respective groove are so operated by the shaft to which said guide is coupled, that they will convey the work piece from the groove into the neighboring groove. The guides are fitted to levers 27, Q9 and 29 which are actuated by com'iecting rods 30 coupled to cranks 30. The levers 27 are fitted directly on the shaft; 18 of levers 21. When therefore the guide is raised by means of lever 27, the levers 21 which will he in a lowered position at some distance trom the guide, will also he raised and on :he guide being sntticiently raised. they will 1 enter the groove through slots 42, lift the piece and cause it to roll into groove, 12. In a similar manner the levers 53:2 and 2 will be operated after the guide is raised: here howeverg the guide levers 8 and 29 are n t titted to the shaft of the levers 22 andEZ L but are coupled thereto by means of levers 51, rods 32 and arms 33. The comparatively long levers 23 he ve hook-shaped front ends. The levers lift the piece t uch a height that it will pass over them to the discharging: incline 17. The cranks 30" which are operated by a hydraulic plunyi'er or the lilo; or by means of rack and pini n ulnar: com plete tull revolution, so tha a l ter the tu r has been eiecteil from the groov thr side, the pieces will roll up to the stops 35.

Preferably also the guides 24 receiving the tubes and the mandrel bars are raised by Sll'lllltll means previous to the raising of the levers.

In the constructional form shown,

4 the movement. is transmitted from the driving means by aid of rods 36, levers 37 and rods 38 to the l'evers 34 and the guides 24. \Vith the latter are coupled the rods 38 by means of bolts 39, while they are coupled to levers 34 by means of bolts 40. The latter engage slotted holes of rods 38 and are therefore not immediately lifted on the rod 38 being raised, the levers 34 being operated only after the guide has been raised. The levers 34 will finally assume such a slanting position, that the tube, out of which the mandrel bar has been withdrawn, will roll off, until it meets the stops 35.- This stop will correspond with the next grooved roll, so that the rolling process may be continued. The tube is introduced between the rolls by means of slidingarms 41 operated through chains or the like. Such introduction of the tubes may, however, also be effected by air. steam or hydraulic pressure or the like.

Another featdreot'the new rolling mill consists in providing the rolls of both sets with grooves, whereby the grooves of but one set of rolls are employed for rolling the "work piece, while the latter passes idly through the grooves of the other set. Grooves 5, (3, 7 and 5, 6, 7 cooperate alteruately with mandrels, so that only grooves 5, (3, 7 or grooves 5. 6, 7 are used. \Vith the arrangement of the mandrels shown in the drawing, the grooves 5, 6, 7 serve for rolling the work piece, while the latter idly passes through grooves 5, 6 7. Therefore the pair of rolls which is temporarily inopcratiie need only be slightly raised so as to let the work piece pass through. When the grooves 5, G, 7 have been worn out, the mandrels are changed to the grooves hitherto not used for rolling, so that these grooves will now roll the work piece. In consequence thereof the rolls can be used twice as long as otherwise with such rolling mills. Instead of exchanging the mandrels, the rolls may be interchanged, while the mandrels remain in position. a

I claim:

1. In a rolling mill, two sets of cooperating rolls, each roll having a plurality of grooves, table-s arranged on opposite sides of the rolls and adapted to alternately support the work piece, vertically reciproeable guides above the tables and adapted to receive the work piece, and means for later ally moving the work piece on the tables, so as to bring said work piece from alinement with one roll-groove into alinement with another groove. 7

2. In a rolling mill, two sets of cooperating rolls. each roll having a plurality of grooves, tabies arrangodon opposite sides of the rolls and adapted to alternately support the work piece. vertically reciprocable guides above the tables and adapted to re ceive the work piece, transporters for laterally mo ing the work piece on the tables, and means for consecutively raising said guides and transporters.

In a rolling mill, two sets of cooperating rolls, each roll having a plurality of grooves, tables arranged on opposite "sides of the rolls and adapted to alternately support the work piece, vertically reciprocable guides abovethe tables and adapted to re ceive the work piece, transporters for laterally moving the work piece on the tables, stops for said work piece, and means for consecutively raising said guides and transporters.

4. In a rolling m ll. two sets of cooperating rolls, each roll hav ng a plurality of grooves, groovetjl tables arranged on opposite sides of the roils. the table grooves eing alined with the roll grooves, and transporters adapted to convey the work piece from one tz:'.lile "groovc into an adjoining table groove. 1

In a rolling mill, two of cooperating rolls, each roll having a plurality of grooves, tables arranged on opposite sides of the rolls and adapted to rece ve the work piece, transporters adapted to laterally move the work piece, and means for limiting said lateral movement of the work piece. I

(3. In a rolling mill, two Lets of cooperating rolls, each roll having a plurality of grooves, tables arranged on opposite sides of the rolls and adapted to receive the work piece, levers adapted tolaterally move the work piece, and mcansbn said levers for limiting said lateral movement of the work piece.

In testimony whereof I hereto atiix my signature in presence of two witnesses.

MAX KOCH. [11. s.l

Witnesses:

ALBERT F. Nurse, ALFRED Hrxuur 

